Sinopec Engineering (Group) Co Instrument Inspector Interview Questions and Answers

RTD stands for Resistance Temperature Detector, which measures temperature by changes in electrical resistance.

• RTD works on the principle that the electrical resistance of a metal increases with temperature.

• The RTD sensor is made of a pure metal, such as platinum, nickel, or copper.

• The resistance change is measured using a Wheatstone bridge circuit.

• RTDs are commonly used in industrial applications for accurate temperat...read more

A pressure transmitter works by converting the pressure of a fluid into an electrical signal.

• Pressure from the fluid acts on a diaphragm inside the transmitter

• This causes a change in resistance, capacitance, or voltage

• The change is then converted into an electrical signal that represents the pressure

• The signal is sent to a control system for monitoring or control

• Example: A pressure transmitter in a boiler system measur...read more

A vortex flow meter works by measuring the frequency of vortices shed by a bluff body in the flow stream.

• Vortex flow meters use a bluff body to create vortices in the flow stream.

• The frequency of vortices shed is directly proportional to the flow rate.

• The meter measures the frequency of vortices to determine the flow rate.

• Vortex flow meters are commonly used in applications where high accuracy is required, such as in t